CVE-2025-21354: Microsoft 365 Apps

High severity, CVSS 7.8. EPSS: 0.9% chance of exploitation in the next 30 days.

Microsoft Excel Remote Code Execution Vulnerability

Affected products

• Microsoft 365 Apps: affected versions not specified
• Microsoft Office: version 2019 only
• Microsoft Office Long Term Servicing Channel: version 2021 only; version 2024 only
• Microsoft Office Online Server: before 16.0.10416.20047 (fixed in 16.0.10416.20047)

Published 2025-01-14. Last modified 2026-06-17.